1960 United States presidential election in Arizona

While Arizona did not hold a formal primary to select delegates to represent the state at the Democratic National Convention, it did hold a state convention in April where delegates were selected.[5]

Since Arizona traditionally operated under the "unit role" at conventions (under which the entire delegation voted for one candidate as a unified bloc), a candidate who could secure a simple majority of their delegation's support would be able to receive the votes of all 17 delegates.[5]

By early 1959, Kennedy's campaign saw strong potential in the state, and recognized a need to organize their efforts there.[5] Arizona was added to the list of states which they began to prioritize as targets for Kennedy to compete in during the primaries.[5] As the primary season unfolded, Kennedy increasingly recognized the state convention as an opportunity to secure delegates in advance of the convention.[5] This arose as an opportunity for Kennedy due to Lyndon B. Johnson's steadfast refusal to launch an active candidacy during the primaries.[5] Rather thank seeking support as a declared candidate, Johnson was relying on a covert, ultimately ineffective, effort to deliver him the support of Arizona's delegation.[5] Johnson was counting on 81 year old senator Carl Hayden and former senator Ernest McFarland to deliver him the state's delegation.[5] Both would ultimately prove to have long since expended their political capital in the state.[5]

Kennedy operative Ted Sorensen found, early on, that the state party chairman, Tucson mayor Don Hummel, was willing to help the Kennedy campaign.[5] Kennedy's campaign's primary base for their Arizona operations was in Pima County, where Hummel lent his grassroots prowess to them.[5]

The primary actor in shoring up Kennedy's support in the state, however, was congressman Stewart Udall.[5] Both Udall and his prover, former county prosecutor Mo Udall, proved themselves to be committed supporters of Kennedy's campaign.[5] A few days prior to the state convention, Sam Rayburn (a Johnson ally) summoned Stewart Udall to the Speaker's Platform in the House Chamber of the United States Capitol.[5] He inquired as to whether Udall was going to be an active figure in the state convention, which Udall confirmed that he would be.[5] Rayburn responded sternly, "Well, I have a candidate for the nomination, my colleague from Texas. I don't want you to hurt him."[5] Udall attempted to placate Rayburn by saying, "Mr. Speaker, I am not trying to hurt anybody. I committed myself several months ago to John Kennedy, and I am going to do everything I can to help him. I am not trying to hurt your man. As a matter of fact, if Kennedy can't get the support, your man is obviously the man who will. If I can't put Kennedy over, I'm not going against him."[5]

After a string of hostile caucuses to select delegates, the state convention ultimately produced a delegation that favored Kennedy (with two-thirds of the delegates being Kennedy supporters).[5]